Chicago to test dockless bike sharing

Jacquelyn Martin / AP

Two dockless LimeBikes share the sidewalk with others from Washington, D.C.'s docked share program called Capital Bikeshare in Washington. Shared bikes that can be left wherever the rider ends up are helping more people get access to the mode of transportation that reduces car traffic and increases exercise. Over the last year, startup companies have brought the bikes that don't require docking stations into city after city in the U.S.